| 摘要 |
<p>Provided is a process for producing an ethylene/tetrafluoroethylene copolymer composition that has good moldability and that produces molded products having excellent mechanical characteristics. The process for producing a fluorine-containing copolymer composition involves: heating a mixture (D) that contains a high-molecular-weight fluorine-containing copolymer (A), a low-molecular-weight fluorine-containing copolymer (B), and a solvent (C) to a temperature higher than or equal to a temperature at which the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) dissolve into the solvent (C) and thereby making the mixture (D) into a solution, said high-molecular-weight fluorine-containing copolymer (A) having a melt viscosity of from 1500 to 35000 Pa·s at 15°C above the melting point and including tetrafluoroethylene-based repeating units and ethylene-based repeating units, said low-molecular-weight fluorine-containing copolymer (B) having a lower molecular weight than said fluorine-containing copolymer (A), having a melt viscosity of from 50 to 3000 Pa·s at 15°C above the melting point, having a melt viscosity, at a temperature 15°C above the melting point of said fluorine-containing copolymer (A), that is less than or equal to one-fifth of the melt viscosity of said fluorine-containing copolymer (A) at said temperature, and including tetrafluoroethylene-based repeating units and ethylene-based repeating units, said solvent (C) being capable of dissolving said fluorine-containing copolymer (A) and said fluorine-containing copolymer (B) at a temperature lower than or equal to the melting point of said fluorine-containing copolymer (A) and the melting point of said fluorine-containing copolymer (B); and then removing the solvent (C).</p> |
